<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    style>* {
        margin: 0;
        padding: 0;
    }
    
    html,
    body {
        overflow: hidden;
    }
    
    .box {
        height: 100vh;
        display: flex;
    }
    
    .left,
    .right {
        width: 200px;
        min-height: 500px;
        background-color: greenyellow;
    }
    
    .content {
        background-color: pink;
        min-height: 500px;
        flex: 1;
    }
</style>

<body>
    <div class="box">
        <div class="left">left</div>
        <div class="content">content</div>
        <div class="right">right</div>
    </div>
</body>

</html>